Improvement in trestles



M. M. LUCKY.

Trestles.

N0.14I,228 Patented July 29, I873.

\Yfi'nesses [he/mar UNITED STATES PATENT OFFICE.

MAHLON M. LUCKY, OF INDIANAPOLIS, INDIANA.

IMPROVEMENT IN TRESTLES.

Specification forming part of Letters Patent No. 141,228, dated July 29,1873; application filed March 1, 1873.

To all whom it may concern:

Be it known that I, MAHLON M. LUCKY, of Indianapolis, in the county ofMarion and State of Indiana, have invented certain Improvements inTrestle-Clamps, of which the following is a specification:

My invention relates to providing a clamp by means of which to securethe legs to the back of a trestle, and which, while applicable totrestles of any size, is especially applicable to large ones, such asare used by lasterers, brick-masons, and paper-hangers; and it consistsin constructing the clamps in such a manner that the legs and back maybefirmly and securely clamped together and at the same time, so thateither legs or back may be readily removed; the object being to enablethe user to readily substitute either long or short backs or legs, asmay be required, to adapt the trestle to high or low ceilings, or largeor small rooms, and other similar purposes.

The additional advantages of the clamp are, that the trestlesconstructed with it may be readily taken apart and removed from room toroom or story to story of a building, or from one building to another,with greater ease and at less expense in handling, or stored away inless space than those that are nailed or otherwise permanently fixedtogether.

Figure l is a side elevation of a portion of a trestle having a clamp,to receive the legs and support the back embodying my invention, appliedthereto. Fig. 2 is an end elevation of the same.

A is the back, and B B the legs, of the trestle. 0 are horizontal piecesof wood faced on the side next the back A with a metal plate, in whichthe screws D that clamp the legs are fixed. E' are metal plates, formedas shown, and through the outer ends of which, on each side of the legs,the screws D pass, and on the outer ends of which thumb-nuts F areplaced for the purpose of clamping the plates E to the legs. G is a boltthat passes through the upper end of plates E, and also through the backA, as shown by the dotted lines in Fig. 2, and is provided with athumbnut, G. The upper ends of the legs are designed to rest against theunder side of bolt G. Two jaws, H, formed as shown, and provided withbolts I and thumb-nuts J, are fixed to the bars 0, upon which the back Arests, and which form the support thereof, as shown.

When it is designed to remove the trestles from one room to another ofthe same height, the bolts G may be removed and the thumbnuts Jloosened, which will permit of the back being lifted out of the clamp,and thus more readily removed.

If it is desired to remove the trestle to a room having less height ofceiling, and shorter legs are required, this may be done by releasingthe thumb-nuts F and G, which permits of their being readily removed andshorter legs substituted. Spiral springs between the plate E andhorizontal pieces of wood 0 serve to spring off plate E when thethumb-nuts F are loosened.

The clamp thus constructed "enables me to readily and convenientlyconstruct a trestle of any desired length or height in any place that itmay be required, and also enables me to move them from place to placemuch more readily than if they were nailed or otherwise rigidly fixedtogether.

I claim as my invention The trestle-clamp eomposedof the parts 0 D E F GG H I J, constructed and arranged substantially as and for the purposeset forth.

MAHLON M. LUCKY. Witnesses 0. F. MAYHEW, DAN. W. KNEFLER.

